ObusForme Back Belt Unisex Designed to promote proper posture and good body mechanics to help maintain a healthy back Can be used while lifting, pushing, pulling, walking, exercising, and repetitive bending or twisting Size Md/Lg fits waist circum. 33-40 The ObusForme Back Belt Unisex design accommodates most physiques Conforms and supports the lower back, promoting muscle relaxation and proper alignment of the back Built-in ventilated lumbar pad provides additional support to the lumbar area Breathable nylon mesh wrap with adjustable hook and front loop closure holds the belt in place Lightweight; Sleek, stylish low profile. Wear on top of or under clothing Designed for industrial and personal usage; any profession and task where proper posture and good body mechanics are essential All materials are hypoallergenic Hand-wash Unisex design accommodates most physiques